Geometrically nonlinear effects on the aeroelastic response of a transport aircraft configuration
File(s)Cea_JoA_accepted.pdf (5.57 MB)
Accepted version
Author(s)
Cea, A
Palacios, R
Type
Journal Article
Abstract
This paper investigates geometrically-nonlinear aeroelastic effects on an industry-level aircraft configuration. Results are obtained via a new approach that uses geometrical information to compute nonlinear effects and seamlessly integrates with conventional, linear aeroelastic load packages. The starting point is a generic finite-element model and frequency-domain aerodynamic influence coefficient matrices, and the resulting system includes control inputs, longitudinal trim, or gust disturbances in time domain, which can be employed separately or in combination to obtain a nonlinear dynamic model for loads and stability analysis. The aeroelastic response of a long range aircraft is studied, highlighting the difference between linear and nonlinear approaches in the calculations of the aircraft flying equilibrium, dynamic perturbations, and variations to the flutter boundary. Results justify the need for geometrically nonlinear analysis in the production environment of airplanes with ultra high aspect ratio wings.
Date Issued
2022-07-25
Date Acceptance
2022-06-23
ISSN
0021-8669
Publisher
American Institute of Aeronautics and Astronautics
Start Page
205
End Page
220
Journal / Book Title
Journal of Aircraft: devoted to aeronautical science and technology
Volume
60
Issue
1
Copyright Statement
Copyright © 2022 by Alvaro Cea and Rafael Palacios. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. All requests for copying and permission to reprint should be submitted to CCC at www.copyright.com; employ the eISSN 1533-3868 to initiate your request. See also AIAA Rights and Permissions www.aiaa.org/randp.
Identifier
https://arc.aiaa.org/doi/10.2514/1.C036740
Publication Status
Published
Date Publish Online
2022-07-25